180 Degrees
 

Don't hate me because I'm....stupid!

Okay guys I just gotta ask one question! My propeller turns 180 degrees by hand, thats it, I assumed thats normal, but just want to ask because I heard that talk about some people not being able to turn it because something was missing and maybe they meant not able to turn it continously, anyway. thanks

Tom

180 Degrees
 

I'm not exactly sure what you mean.

If you can only turn the engine 180 degrees, something is wrong.

Assuming a small 2 cycle glow type engine. With the prop firmly attached to the engine, you should be able to turn the prop a full rotation, or 360 degrees. There will be compression somewhere in there and you will feel some resistance during compression, but you you should be able to easily turn the prop past that by hand.

If you remove the glow plug, then engine should turn over very easy, a full 360 degrees.

180 Degrees
 

Like MonkeyBoy said, but one note. Some well-made two-stroke ABC engines will have a sticky spot when the piston gets to the top (TDC). It may be nearly impossible to turn the crank though that point by hand if you don't have a prop mounted. This is a good thing, don't be alarmed. Get some fuel in there and a prop on it, and it won't be a problem, and your engine will produce the power it should.

180 Degrees
 

Like Montague said, but I'll add a bit more. SOME new ABC engines are difficult to turn through top dead center WITH a prop.

I've seen one or two that I thought were hydro-locked, but weren't. I was nearly afraid to force it through compression. ;)

Tom,
I'm guessing that you meant 360 degrees, or one full rotation. You should be able to turn it 180 degrees each way if you're centered on the stroke. :D
Dennis-

180 Degrees
 

Some ABC engines may even require a hairdryer blown on it to start the first couple times.

180 Degrees
 

is it a norvel? they are made that way and have a special break in proceedure to get thwem to run properly

john

180 Degrees
 

I am guessing you mean 180 degrees before you feel compression? That is normal. I would highly advise getting help before you try to start this. It sounds as if you are new. You need to have someone show you how to start it and be safe, as well as checking out the plane it is in to make sure everything is set up right and the controls are right. They can also teach you to fly it so it doesn't get broken.